Contact Platform Support
Help CenterCoil Spring, 0.3mm Wire, 5mm OD, 20mm Length, Spring Steel, High Fatigue Resistance
Product Spotlights
Related Products
-
65Mn Carbon Steel Coil Spring, 1mm Wire, Heavy Duty Tension Spring, Mill Test Report ProvidedNegotiableMOQ: 1 Piece -
Coil Spring, 0.8mm Wire, 8mm Outer Diameter, 304 Stainless Steel, Compression Spring, Non-MagneticNegotiableMOQ: 1 Piece
-
Chrome Silicon Alloy Coil Spring, 10-50mm Outer Diameter, ISO 9001 Standard Compliant Tension SpringNegotiableMOQ: 1 Piece
-
Heavy Duty Coil Spring, 5mm Wire Diameter, 150mm Free Length, Zinc-Plated for Automotive SuspensionNegotiableMOQ: 1 Piece
-
Custom Coil Spring With 1 Year Warranty, 0.1-20mm Wire Diameter, Any Material and Finish, Standard CompliantNegotiableMOQ: 1 Piece
Welcome to Anping County Boli Hardware Wiremesh Products Factory, a trusted manufacturer since 1998 with over two decades of experience in precision spring production. Our Coil Spring with 0.3mm wire diameter, 5mm outside diameter, and 20mm length is engineered from high-quality spring steel to deliver exceptional fatigue resistance. Designed for demanding applications, this spring ensures reliable performance under repeated stress cycles, making it an ideal choice for industries requiring consistent force and durability.
We understand that every component matters in your assembly. That's why each coil spring undergoes strict quality control to meet tight tolerances. Our manufacturing facility in Hengshui, Hebei, China, is equipped with advanced machinery, allowing us to produce springs with uniform dimensions and superior elasticity. Whether you need a standard part or a custom solution, our team is ready to support your project with technical expertise and fast turnaround times.
Product Features & Technical Specifications
- Wire Diameter: 0.3mm – precise and consistent, suitable for compact mechanisms.
- Outside Diameter: 5mm – ideal for limited-space assemblies.
- Free Length: 20mm – standard length available; custom lengths upon request.
- Material: Spring steel (e.g., 65Mn, 60Si2Mn) – high tensile strength and excellent fatigue properties.
- Fatigue Resistance: High – tested to withstand millions of cycles without failure.
- End Configurations: Closed, open, or ground ends – customizable to your application.
- Surface Treatment: Plain, zinc-plated, or black oxide – optional corrosion protection.
| Parameter | Value |
| Wire Diameter (d) | 0.3 mm |
| Outside Diameter (OD) | 5 mm |
| Free Length (L) | 20 mm |
| Material | Spring Steel |
| Fatigue Rating | High (≥10⁶ cycles typical) |
| Tolerance Grade | ±0.05 mm (wire diameter) |
| End Type | Closed & Ground (standard) |
| Surface Finish | Plain (as supplied) |
Our coil springs are manufactured using a controlled heat treatment process that optimizes the spring steel's microstructure, resulting in excellent elasticity and minimal set loss. This ensures that the spring maintains its original dimensions and force characteristics even after prolonged use. The high fatigue resistance is particularly critical for applications such as automotive suspension components, mechanical seals, electronic switches, and precision instruments where reliability is non-negotiable.
Why Choose Our Coil Spring?
- Consistent Quality: Each spring is inspected using automated optical measurement systems to ensure dimensional accuracy.
- Customizable Options: We offer modifications in wire diameter, OD, length, end type, and surface coating to meet your specific requirements.
- Competitive Pricing: As a direct manufacturer with an annual export value of US$5-10 million, we provide cost-effective solutions without compromising quality.
- Global Reach: Our products are shipped to North America, South America, Europe, Asia, Africa, and Oceania via major ports like Tianjin, Qingdao, and Shanghai.
- Fast Lead Times: Standard samples are available within 5-7 working days; production orders typically completed in 15-20 days.
We take pride in our long-standing reputation as a reliable supplier. Since 1998, we have served clients across diverse industries, from automotive giants to small precision engineering firms. Our commitment to continuous improvement and customer satisfaction drives us to deliver products that exceed expectations. Contact us today to request a quote or discuss your custom spring requirements. Let our expertise be the foundation of your success.
Frequently Asked Questions
1. What material is this coil spring made of?
Our standard material is spring steel (65Mn or equivalent), which offers high tensile strength and excellent fatigue resistance. Other materials like stainless steel or music wire are available upon request.
2. Can you provide custom dimensions?
Yes, we specialize in custom springs. You can specify wire diameter, OD, length, number of coils, and end type. Minimum order quantities may apply for custom sizes.
3. What is the typical tolerance for wire diameter?
The standard tolerance is ±0.05 mm for wire diameter. For tighter tolerances, please consult our engineering team to discuss feasibility.
4. How do you ensure the spring's fatigue resistance?
We use controlled heat treatment and shot peening (optional) to enhance fatigue life. Each batch is tested for consistency. Our high fatigue resistance springs are designed to withstand millions of cycles under normal working conditions.
5. What surface finishes are available?
We offer plain (as-is), zinc-plated, black oxide, or phosphate coating. Surface treatment can be selected based on corrosion resistance requirements. Please specify when ordering.
6. What is the minimum order quantity (MOQ)?
For standard sizes like 0.3mm wire, 5mm OD, 20mm length, the MOQ is 1000 pieces. For custom designs, MOQ may vary; please contact us for details.
7. How do you package the springs for shipping?
Springs are packed in plastic bags or boxes, then placed in sturdy cartons with cushioning to prevent deformation. Export packaging is available for sea or air freight.
8. Do you offer samples before bulk order?
Yes, we provide samples at a nominal cost (refundable with bulk order). Samples are usually shipped within 5-7 working days after payment confirmation.
Send Inquiry to This Supplier
You May Also Like
-
Suspension Coil Spring for Heavy Machinery, 60Si2Mn Steel, 200mm Free Length, 10mm Wire DiaNegotiableMOQ: 1 Piece
-
Precision Ground Coil Spring, 0.2mm Tolerance, 60Si2MnA Steel, Die Spring for Industrial MoldsNegotiableMOQ: 1 Piece
-
Variable Pitch Coil Spring, 0.8-2.0mm Wire, 25mm OD, 10mm ID, Cold Wound for High Cycle ApplicationsNegotiableMOQ: 1 Piece
-
Factory Direct Coil Spring, Mill Test Report Provided, 0.5-10mm Wire Range, Free Sample AvailableNegotiableMOQ: 1 Piece
-
Closed End Coil Spring, 1.2mm Wire, 8mm Outer Diameter, Stainless Steel 301, Custom Length AvailableNegotiableMOQ: 1 Piece
-
Coil Spring for Valve Actuator, 304 Stainless Steel, 0.5N/mm Rate, 100mm Stroke, 1 Year WarrantyNegotiableMOQ: 1 Piece
-
Customized 304 Stainless Steel Coil Spring, 0.5-5mm Wire Diameter, Compressed Spring for Mechanical AssemblyNegotiableMOQ: 1 Piece
-
Extension Coil Spring 302 Stainless Steel Initial Tension 5N Max Extension 200mmNegotiableMOQ: 1 Piece
-
Custom Compression Coil Spring 304 Stainless Steel 0.5-10mm Wire Diameter ISO Standard CompliantNegotiableMOQ: 1 Piece
-
Heavy Duty Coil Spring 50CrVA Steel Wire Diameter 8mm Heat Treated for AutomotiveNegotiableMOQ: 1 Piece
